JP4133287B2 - Armrest - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an armrest of a chair used in association with an office desk or the like.
[0002]
[Prior art]
Armchairs of chairs used in conjunction with office desks are generally fixed, but recently, in order to improve work efficiency and fatigue, armrests are used according to the user's body shape. Proposals have been made to change the elbow support position by adjusting the angle of the armrest according to the work content, such as operating the keyboard and mouse of a personal computer or the like, such as those that can be moved up and down.
[0003]
For example, in Patent Document 1, an armrest rotation mechanism and a slide mechanism are separated and provided separately to increase the range of rotation of the armrest in the inner direction so that the elbow can be supported in a more comfortable posture. In addition, an armrest that can be stably supported in any orientation is disclosed.
[0004]
Specifically, the column portion standing from both sides of the seating portion is hollow, and an elevating rod is inserted into the column. A disc-shaped seat plate is fixed to the top surface of the lift rod, and a shaft is erected at the center of the seat plate.
[0005]
In addition, a disc-shaped angle holding plate, an elastic plate member, and a substantially cylindrical holder are inserted through the shaft body in order on the upper surface of the seat plate. Here, the angle holding plate is prevented from rotating around the shaft body, and a radial engagement groove is formed on the outer peripheral side of the angle holding plate.
[0006]
On the other hand, the elastic plate material is formed by punching a spring plate, and a pair of elastic pieces extend obliquely downward on the outer peripheral edge of the ring-shaped portion. A hemispherical protrusion is formed on the back surface of the tip of the elastic piece, and can engage with an engaging groove formed in the angle holding plate.
[0007]
Here, when the elbow rest is rotated, the elastic plate rotates together with the elbow rest via the elbow rest support and the holder, but the angle holding plate is stopped around the shaft body, so it is formed on the elastic plate. The protrusion of the elastic piece repeatedly engages and disengages from the engagement groove of the angle holding plate, and the elastic piece repeats elastic deformation and restoration.
[0008]
Since the elastic piece bends upward and spreads outward, the engagement groove of the angle holding plate is formed in a radial shape so as to absorb the difference in the separation distance between the protrusions of the elastic piece.
[0009]
On the other hand, in order to disengage the protrusion from the engagement groove, the elastic piece must be elastically deformed. However, since the elastic piece bends upward and spreads outward, the elastic piece is elastically deformed. The force required to make the elastic piece smaller as the elastic piece spreads outward.
[0010]
In other words, the protrusion can be released from the engagement groove with a slight force. For this reason, there is a concern that the elbow pad may rotate carelessly in a state where the elbow is placed while the holding force for holding the state where the protrusion is engaged with the engagement groove is weak.
[0011]
[Patent Document 1]
JP 2002-51869 A (3rd page, FIG. 4)
[0012]
[Problems to be solved by the invention]
In view of the above facts, an object of the present invention is to provide an armrest that can reliably hold an elbow pad at a predetermined rotation angle.
[0013]
[Means for Solving the Problems]
  The invention according to claim 1 is a column erected from both sides of a seating portion, a seat plate provided at an upper end portion of the column, an elbow base supported by the seat plate and to which an elbow pad is attached, and the elbow A long hole which is formed in a base and engages with a shaft standing from the seat plate so that the elbow stand is slidable and rotatable with respect to the seat plate;Provided on theThe central part is fixed to the shaft body so as not to rotate.AsA disk having a plurality of recesses formed along the circumferential direction on the upper surface, and the axial direction of the shaft bodyWhatA plate that is rotatably attached to the shaft body together with the elbow mount in a state where the movement of the disk is restricted, and a plate that includes a protrusion that engages with the recess, and an outer periphery of the disk below the disk A gap is provided in which an elastic plate that allows deformation of the portion can be disposed.
[0014]
  According to the first aspect of the present invention, a plurality of recesses are provided along the circumferential direction on the upper surface of the disc whose central portion is fixed to the shaft body so as not to rotate. The axial direction of the shaft bodyWhatThe plate that is rotatably attached to the shaft body together with the elbow mount in a state where the movement of the head is constrained is provided with a protrusion that engages with the recess. Here, a gap in which an elastic plate that allows deformation of the outer peripheral portion of the disk can be disposed is provided below the disk.
[0015]
When the elbow support is rotated, the elbow support rotates with respect to the seat plate and the shaft body by the long hole. At this time, the plate rotates together with the elbow stand, but since the disk cannot rotate with respect to the shaft body, the protrusion of the plate that can be engaged with the recess formed in the disk is The state of engagement and disengagement will be repeated.
[0016]
  Here, the plate is the axial direction of the shaftWhatTherefore, in the state in which the protrusion is disengaged from the recess, the outer peripheral side of the disk is deformed and bent when the protrusion is disengaged from the recess. At this time, deformation of the disc is allowed by the gap provided below the disc.
[0017]
  Since elastic force is accumulated in the disk due to the deformation of the disk, when the protruding part of the plate reaches the concave part of the disk, the diskButWhile restoring, the protrusion is engaged with the recess, and the elbow pad stops rotating. Thus, by deforming the disk itself, for example, the force required to deform is increased compared to the case where the elastic piece is projected from the elastic plate material.
[0018]
Therefore, compared with the case where the elastic piece is projected from the elastic plate material, the holding force for holding the state in which the protrusion is engaged with the concave portion can be increased, and the elbow pad is placed with the elbow placed. There is no risk of accidental rotation. Further, by deforming the disc itself, the elastic function can be sufficiently exerted without sagging like a leaf spring such as an elastic piece.
[0019]
Further, in a state where the projection of the plate is disengaged from the recess of the disc, elastic force is accumulated in the disc due to the deformation of the disc, and when the projection reaches the recess, the recovery of the disc At the same time, since the protrusion is engaged with the recess, a click is obtained, and the state in which the elbow pad has stopped rotating can be objectively understood.
[0020]
  The invention described in claim 2The armrest according to claim 1, wherein the elastic plate is disposed in the gap.
  In the invention according to claim 2,In the armrest according to claim 1, the elastic plate is disposed in a gap provided below the disc, thereby allowing deformation of the outer peripheral portion of the disc by the elastic plate.
  Claim3The invention described inThe armrest according to claim 1 or 2,Between the discElastic plateIt has the wear prevention board used as the sliding surface with respect to the said elbow stand on both sides.
[0021]
  When there is no anti-wear plate,Elastic plateAnd when the elbow rotates, the elbowElastic plateWill be slid. For this reason,Elastic plateWears on the disc, butElastic plateBy providing a wear prevention plate that rotates integrally withElastic plateWill not interview the elbow stand directly,Elastic plateWill not wear out.
[0022]
  Claim4The invention described inIn the armrest in any one of Claims 1-3,It is characterized by having a closing plate that is rotatably inserted into the shaft body, is prevented from rotating with respect to the elbow stand, and closes the elongated hole that is exposed as the elbow mount slides. In this way, by providing a closing plate that closes the long hole that is exposed as the elbow rest slides, the finger is prevented from entering the long hole.
[0023]
  Claim5The invention described inIn the armrest in any one of Claims 1-4,It has a stopper which is fixed to the shaft body and abuts on a peripheral edge of the elongated hole to regulate the rotation angle of the elbow stand. In this way, by restricting the rotation angle of the elbow stand, the elbow stand is prevented from being arranged in the front-rear direction with respect to the seating portion.
[0024]
  Claim6The invention described inIn the armrest according to any one of claims 1 to 5,The support is a hollow support to which the seat plate is fixed, a lock member protruding from a long hole formed in a side wall of the support to both sides, and a lock release for swinging the lock member along the long hole Means, and a sheath tube into which the support is inserted and removed, and a rack groove formed on the inner wall of the sheath tube along the vertical direction to lock both ends of the lock member. .
[0025]
  Claim6In the invention described in (1), the support column is provided with a sheath tube, and the support is inserted into the sheath tube so as to be able to enter and exit. A long hole is provided in the side wall of the support, and a lock member protrudes from the long hole to both sides. The lock member can be locked to a rack groove formed on the inner wall of the sheath tube along the vertical direction of the sheath tube, and the support is positioned with respect to the sheath tube in a state where the lock member is locked to the rack groove. Is done.
[0026]
On the other hand, the support column is provided with a lock release means, and the lock member can swing along the long hole. The lock member is rocked along the long hole by the lock release means, thereby releasing the state where the lock member is locked in the rack groove. In this state, after the support is moved in and out of the sheath tube, when the lock release means is returned to the original state, the lock member swings along the long hole and is locked in the rack groove.
[0027]
Since the support can be extended by moving the support in and out of the sheath tube in this manner, the height of the elbow pad can be adjusted via the seat plate and the elbow stand.
[0028]
Here, by forming a rack groove on the inner wall of the sheath tube, the through hole is passed through the sheath tube, and unlike the case where the rack groove is formed at the edge of the through hole, the lock member is rocked with respect to the long hole. Even if it is slightly displaced in the direction orthogonal to the swinging direction when moving, the lock member is restricted by the inner wall, so that only one end of the lock member is locked in the rack groove. There is no.
[0029]
For this reason, since the support is always supported by the rack groove evenly through both ends of the lock member, it is possible to prevent the rack groove from being damaged due to the support of one end of the lock member.
[0030]
  Claim7The invention described inThe armrest according to claim 6,An arm on which the lock release means is swingably loaded into the support and to which the lock member is attached; and an urging means for urging the arm and engaging the lock member with the rack groove; And a release button for releasing the locking state between the lock member and the rack groove by pressing the arm from the outside of the support.
[0031]
  Claim7In the invention described in (1), the arm to which the lock member is attached is slidably loaded into the support, and the arm is urged by the urging means so that the lock member is engaged with the rack groove. On the other hand, a release button is provided for releasing the locking state between the lock member and the rack groove by pressing the arm from the outside of the support.
[0032]
Therefore, when the release button is pressed, the locked state between the lock member and the rack groove is released, and when the pressing force of the release button is released, the lock member is locked to the rack groove by the urging force of the urging means. At the same time, the release button returns to the original state.
[0033]
  Claim8The invention described inThe armrest according to any one of claims 1 to 7,The disc is molded from resin and the elasticBoardIs formed of a foamable resin or an elastomer.
[0034]
The disc fixed to the shaft is slid by the plate that rotates with the elbow rest when the elbow rest rotates around the axis, but the disc is made of resin to reduce wear on the disc. be able to.
[0035]
In addition, the sliding resistance when the protrusions of the plate engage with the recesses of the disk is reduced, and the rotational movement of the elbow support can be made smooth. Here, a better effect can be acquired by selecting a grade with low sliding resistance among resin.
[0036]
  on the other hand,Elastic plateIs formed of a foamable resin or an elastomer.Elastic plateIs deformed following the deformation of the disk due to engagement and disengagement between the projection of the plate and the recess of the disk, and therefore, deformation and restoration are repeated as the plate rotates. For this reason,Elastic plateIs formed of a foamable resin or an elastomer.
[0037]
  Claim9The invention described in 1 is characterized in that the inner shape of the recess and the outer shape of the protrusion are spherical, and the curvature radii thereof are substantially the same. In this way, the concave portion of the disc and the protrusion of the plate are spherical, and the curvature radius of the concave portion and the protrusion is substantially the same, so that the protrusion is engaged with the concave portion, and the plate and the elbow stand are The elbow pad does not rattle when the elbow pad stops rotating.
[0038]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, armrests according to embodiments of the present invention will be described.
[0039]
As shown in FIG.1 and FIG.9, the armrest 10 is provided in the both sides of the seating part of a chair, and the raising / lowering movement, a slide movement, and a rotational movement are possible. The armrest 10 is fixed to both side portions of a seating portion (not shown) and can be fixed to a solid fixing portion 12 having a substantially elliptical cross section.
[0040]
The distal end portion of the fixed portion 12 is provided with a housing portion 14 that is cut out into a substantially rectangular shape and opened, and a substantially hemispherical projecting portion 16 projects from the bottom surface of the housing portion 14. . A screw hole 16A is formed in the projecting portion 16, and a fixing screw 18 can be screwed.
[0041]
In addition, a hollow bush 20 having an open end and a substantially elliptical cross section can be externally inserted into the accommodating portion 14. An insertion hole 20A is formed at one end of the bush 20 at a position corresponding to the screw hole 16A when the bush 20 is externally inserted into the housing portion 14, and the fixing screw 18 can be inserted therethrough. .
[0042]
In addition, an opening 22 is formed at the other end of the bush 20 so as to match the inner wall of the housing portion 14, and can communicate with the housing portion 14. Further, a hollow elliptical pipe 24 (sheath tube) having both ends opened and a substantially elliptical cross section can be extrapolated to the bush 20.
[0043]
On one end side of the elliptical pipe 24, a screw hole 24A is formed at a position corresponding to the insertion hole 20A when the elliptical pipe 24 is externally inserted into the bushing 20. 20 can be fixed to the fixing portion 12.
[0044]
Here, a set of rack members 26 can be locked to the elliptical pipe 24 (described later). The pair of rack members 26 are combined with each other, the outer wall surface is elliptical, the inner wall surface is substantially rectangular, and the rack members 26 constitute an accommodating portion 28.
[0045]
When the elliptical pipe 24 to which the set of rack members 26 is locked is extrapolated to the bush 20, the rack member 26 is positioned with the lower end surface of the rack member 26 in contact with the bush 20, and the accommodating portion of the rack member 26 is also positioned. 28 communicates with the opening 22 and the accommodating portion 14.
[0046]
Further, as shown in FIG. 2, a slide groove 32 is formed along the longitudinal direction of the rack member 26 on the inner wall 26 </ b> A of the accommodating portion 28 that faces the rack member 26 in a state in which the rack members 26 are aligned with each other. Has a plurality of locking grooves 34 branched at right angles.
[0047]
Further, the meat stealing portion 36 is recessed in the upper surface 26B where the rack members 26 are in contact with each other in a state of being combined with each other, thereby preventing variation in dimensional accuracy due to sink marks. The meat stealing portion 36 spans the outer wall surface and the inner wall surface by a plurality of ribs 38, thereby strengthening the rack member 26.
[0048]
Further, a cylindrical boss 40 is communicated with the rib 38, and a screw (not shown) can be screwed. The rack member 26 is integrated with this screw. Here, as shown in FIG. 1, a pair of claw portions 42 project from the outer wall surface of the rack member 26 along a direction orthogonal to the axial direction of the rack member 26.
[0049]
On the other hand, a locking hole 44 is formed in the center of both side surfaces of the elliptical pipe 24 along a direction orthogonal to the axial direction of the elliptical pipe 24 so that the claw portion 42 can be locked. .
[0050]
When the rack member 26 is inserted into the elliptical pipe 24, the claw portion 42 is pressed inward to reduce its diameter, and when it reaches the locking hole 44, it is restored and locked to the locking hole 44. As a result, the rack member 26 and the elliptical pipe 24 are integrated.
[0051]
Here, as shown in FIGS. 1 and 2, the accommodating portion 28 of the rack member 26 includes a square pipe 46 as a hollow support and a substantially rectangular parallelepiped lock arm 48 that can be inserted into the square pipe 46. It can be accommodated. A notch 50 is cut out on each side wall 46A facing the inner wall 26A in the state of being inserted into the rack member 26 at the lower end of the square pipe 46.
[0052]
When the elliptical pipe 24 is fixed to the bush 20 in a state where the rack member 26 in which the lock arm 48 and the rectangular pipe 46 are inserted is fixed to the elliptical pipe 24, the lower end portion of the rectangular pipe 46 is 20 at the opening 22 and the accommodating portion 14 of the fixed portion 12. At this time, the notch 50 formed at the lower end of the square pipe 46 abuts against the protruding portion 16 of the accommodating portion 14, and the square pipe 46. Is restricted.
[0053]
In addition, below the central portion of the side wall 46A of the square pipe 46, the square pipe 46 is accommodated in the rack member 26, and the latch is located on the end side of the rack member 26 along the width direction of the side wall 46A. A long hole 52 corresponding to the length of the groove 34 and the slide groove 32 passes therethrough.
[0054]
Further, a round hole 54 penetrates the upper side of the central portion of the side wall 46 </ b> A corresponding to the locking groove 34 positioned on the upper end side of the rack member 26 with the square pipe 46 being accommodated in the rack member 26. .
[0055]
Further, an insertion hole 56 is formed above the side wall 46B orthogonal to the side wall 46A of the square pipe 46, and a distal end portion of a release button 58 described later can be inserted.
[0056]
On the other hand, a plurality of ribs 60 are provided along the width direction of the lock arm 48 on the side wall 48A of the lock arm 48 facing the side wall 46A while being inserted into the square pipe 46. In addition, it prevents bending and improves dimensional accuracy.
[0057]
Further, the side wall 48A of the lock arm 48 is tapered, and a long hole 62 formed along the axial direction of the lock arm 48 passes through the lower end portion. Further, a round hole 64 penetrates the central portion of the side wall 48A of the lock arm 48 at the end in the width direction.
[0058]
Here, the separation distance between the long hole 62 and the round hole 64 is substantially the same as the separation distance between the long hole 52 and the round hole 54 formed in the square pipe 46, and the lock arm 48 is inserted into the square pipe 46. In this state, the round hole 54 and the round hole 64 and the long hole 52 and the long hole 62 coincide with each other, and pins 66 and 68 as substantially cylindrical lock members can be inserted therethrough, respectively.
[0059]
On the other hand, an arc plate 70 projects from the side wall 48A of the lock arm 48 facing the side wall 46A of the square pipe 46. The arc plate 70 abuts against the inner wall surface of the side wall 46B of the square pipe 46, and the lock arm 48 can be swung around the pin 68.
[0060]
A pressing plate 72 extends from the upper end portion of the peripheral wall 48B orthogonal to the side wall 48A of the lock arm 48. The pressing plate 72 faces the peripheral portion of the insertion hole 56 formed in the square pipe 46. A mounting portion 74 projects from the back surface of the pressing plate 72.
[0061]
One end portion of the coil spring 76 is attached to the mounting portion 74, and the other end portion of the coil spring 76 abuts on the inner wall surface of the side wall 46 </ b> C facing the side wall 46 </ b> B of the square pipe 46. The pressing plate 72 is pressed. In this state, the pin 66 is locked in the locking groove 34 of the rack member 26, and the square pipe 46 is restricted by the rack member 26 (see FIG. 9).
[0062]
Incidentally, a support cover 78 is provided outside the elliptical pipe 24 and covers the elliptical pipe 24. A mounting hole 78A is formed on the upper end side of the column cover 78, and the release button 58 can be mounted.
[0063]
A mounting claw 58A projects from the outer wall of the head of the release button 58, and the mounting claw 58A is pressed while pressing the pressing plate 72 located at the tip of the release button 58 in the direction against the urging force of the coil spring 76. Is passed through the mounting hole 78A.
[0064]
When the pressing force of the release button 58 is released, the mounting claw 58A is pressed against the peripheral edge of the mounting hole 78A by the urging force of the coil spring 76, and the release button 58 is prevented from coming off and positioned (see FIG. 9). .
[0065]
Here, as shown in FIG. 10, when the release button 58 is pressed, the tip of the release button 58 presses the pressing plate 72 in a direction against the urging force of the coil spring 76. As a result, the pin 66 moves along the long hole 52 of the square pipe 46 around the pin 68.
[0066]
Since the long hole 52 is formed along the width direction of the square pipe 46, the long hole 62 formed along the axial direction of the lock arm 48 is moved to the square pipe 46 by the rotation of the lock arm 48. Absorbs misalignment in the axial direction.
[0067]
Since the pin 66 thus moved is disposed from the locking groove 34 to the slide groove 32, the locked state is released, and the square pipe 46 can be moved in and out of the rack member 26.
[0068]
On the other hand, as shown in FIGS. 1 and 9, an elliptical seat plate 80 is fixed to the upper end portion of the square pipe 46, and a substantially cylindrical shaft body 82 is formed from the central portion of the seat plate 80. Is standing. A key groove portion 82 </ b> A is provided at the distal end portion of the shaft body 82.
[0069]
Further, on the upper surface of the seat plate 80, a stopper member 84 substantially the same as the outer dimension of the seat plate 80 can be placed. An insertion hole 84 </ b> A through which the shaft body 82 can be inserted is formed at the center of the stopper member 84, and the insertion hole 84 </ b> A is inserted through the shaft body 82 and fixed in a state of being overlapped by the screws 81. The stopper member 84 and the seat plate 80 are covered outside by the upper end portion of the column cover 78 and are fixed by screws 83.
[0070]
A stopper rib 86 is erected on the peripheral edge of the insertion hole 84 </ b> A of the stopper member 84. As shown in FIG. 3A, linear portions 86A and 86B are formed on the outer peripheral wall of the stopper rib 86 so as to intersect with each other, and between the linear portions 86A and 86B. Is provided with a concentric circular arc portion 86C of the insertion hole 84A.
[0071]
Further, as shown in FIGS. 1 and 6, an elliptical slider 88 composed of two stages of an upper step part 88 </ b> B and a lower step part 88 </ b> C can be placed on the upper surface of the stopper member 84. An insertion hole 88A through which the shaft 82 can be inserted is formed at the center of the slider 88, and a box-shaped slide rail 96 having a rectangular shape in plan view is formed on the upper surface of the lower step portion 88C of the slider 88. It can be placed.
[0072]
The slide rail 96 can be accommodated in a reinforcing chassis 90 (elbow stand) made of metal. A long hole portion 90 </ b> A is formed on the bottom surface of the reinforcing chassis 90 along the longitudinal direction of the reinforcing chassis 90. Further, insertion holes 92 are provided at the four corners of the reinforcing chassis 90 so that a fixing screw 94 can be inserted.
[0073]
On the other hand, as shown in FIGS. 4 and 6, a long hole portion 96 </ b> A having a smaller diameter than the long hole portion 90 </ b> A of the reinforcing chassis 90 is formed along the longitudinal direction on the bottom surface of the slide rail 96 accommodated in the reinforcing chassis 90. Has been.
[0074]
A fitting rib 98 hangs around the entire periphery of the long hole portion 96 </ b> A, and the fitting rib 98 is fitted into the long hole portion 90 </ b> A of the reinforcing chassis 90. In addition, a mounting rib 100 hangs over the entire circumference of the fitting rib 98, and an elliptical ring cushion 102 is mounted between the fitting rib 98 and the mounting rib 100. It is possible.
[0075]
Further, bent pieces 96B are bent upward on both side walls in the longitudinal direction of the slide rail 96, and the outer wall surface of the bent piece 96B can be fixed in a state of being in contact with the inner wall surface of the reinforcing chassis 90. ing.
[0076]
Here, as shown in FIGS. 5 and 6, the width dimension of the inner wall surface 98 </ b> A of the fitting rib 98 of the slide rail 96 is the outer diameter dimension of the stopper rib 86 formed on the stopper member 84 and the lower step portion of the slider 88. The width dimension of 88 C is substantially the same, and the stopper rib 86 and the lower step portion 88 C of the slider 88 can be engaged with the inner wall surface 98 A of the fitting rib 98.
[0077]
The width dimension of the long hole portion 96A of the slide rail 96 is substantially the same as the width dimension of the upper step portion 88B of the slider 88, and the upper step portion 88B of the slider 88 can be engaged with the long hole portion 96A. ing. For this reason, the slide rail 96 can be slid based on the stopper member 84 and the slider 88.
[0078]
Here, the height of the upper portion 88B of the slider 88 is slightly lower than the thickness of the slide rail 96, and the slider 88 and the slide rail 96 are engaged with each other from the bottom surface of the slide rail 96. The upper part 88B of 88 is not exposed.
[0079]
On the other hand, as shown in FIGS. 1, 4, and 5, the slide rail 96 can accommodate a flat closing member 104. The closing member 104 is provided with a disc portion 104A, and an insertion hole 105 through which the shaft body 82 can be inserted is formed at the center of the disc portion 104A. A flat plate portion 104B extends from the disc portion 104A, and bent pieces 104C are bent upward on both side walls of the flat plate portion 104B.
[0080]
The outer wall surface of the bent piece 104 </ b> C can come into contact with the inner wall surface of the bent piece 96 </ b> B of the slide rail 96, and the closing member 104 is prevented from rotating with respect to the slide rail 96.
[0081]
On the other hand, a closing piece 104D extends from the center of the end of the flat plate portion 104B. The width of the closing piece 104D is larger than the width of the long hole portion 96A of the slide rail 96, and the long hole portion 96A can be closed.
[0082]
When the stopper member 84 and the slider 88 are fixed to the seat plate 80 and the reinforcing chassis 90 to which the ring cushion 102 and the closing member 104 are mounted is placed on the upper surface of the stopper member 84 with the above configuration, the slide rail Since 96, the slider 88, and the stopper member 84 are engaged, the slide rail 96 is slidable with reference to the slider 88 and the stopper member 84. As a result, the reinforcing chassis 90 can slide through the slide rail 96.
[0083]
On the other hand, as shown in FIGS. 1 and 7, an annular circular wear prevention plate 106 made of metal can be placed on the upper surface of the closing member 104. The wear prevention plate 106 is provided integrally with an annular disc selector plate 110 (disc) via an annular disc cushion 108 (elastic plate), and the wear prevention plate 106, cushion 108, and selector plate 110 are integrated. The outer diameters of are substantially the same.
[0084]
Here, the cushion 108 is formed of a foamable resin or an elastomer (for example, foamed urethane or rubber member), and the selector plate 110 is a resin having a low sliding resistance (for example, nylon 66 (glass fiber having a weight ratio of 30%). Etc.)).
[0085]
A key portion 110 </ b> A is provided at the center portion of the selector plate 110, and the key portion 110 </ b> A can be fitted into a key groove portion 82 </ b> A formed on the shaft body 82. Therefore, when the selector plate 110 is inserted into the shaft body 82, the key portion 110 </ b> A is fitted with the key groove portion 82 </ b> A, and the selector plate 110 is fixed to the shaft body 82.
[0086]
Further, a hemispherical concave portion 114 is formed on the upper surface of the selector plate 110 every 20 ° along the circumferential direction on the outer peripheral surface side of the selector plate 110. The selector plate 110 is provided with a metal plate 116 facing each other.
[0087]
An insertion hole 116A through which the shaft body 82 can be inserted is formed at the center of the plate 116, and bent pieces 116B are bent upward on both sides of the plate 116.
[0088]
Here, the bent piece 104 </ b> C of the closing member 104 has a height that does not contact the plate 116, and the outer wall surface of the bent piece 116 </ b> B can be in contact with the inner wall surface of the bent piece 96 </ b> B of the slide rail 96. As a result, the plate 116 is prevented from rotating with respect to the slide rail 96.
[0089]
A pair of hemispherical protrusions 118 protrude from the lower surface of the plate 116 in parallel with the bent piece 96B with the insertion hole 116A interposed therebetween. The radius of curvature of the protrusion 118 is substantially the same as the radius of curvature of the recess 114 formed in the selector plate 110, and can be fitted at positions facing each other.
[0090]
The fixing screw 122 is screwed into the shaft body 82 through the washer 120 from the upper surface of the plate 116. In this state, the upper surface of the fixing screw 122 is set to a height that does not protrude from the upper end portion of the peripheral wall of the reinforcing chassis 90.
[0091]
In this way, by screwing the fixing screw 122 into the shaft body 82, the selector plate 110, the cushion 108 and the wear prevention plate 106 are unable to rotate with respect to the shaft body 82, and the reinforcing chassis 90 and the slider 88. The slide rail 96, the closing member 104, and the plate 116 are made immovable with respect to the axial direction of the shaft body 82 in a state where the slide rail 96, the closing member 104, and the plate 116 are rotatable with respect to the shaft body 82.
[0092]
On the other hand, the elbow pad 124 is substantially elliptical in a plan view, and an opening 124A is formed on the bottom surface so that the reinforcing chassis 90 can be accommodated. In a state where the elbow pad 124 is put on the reinforcing chassis 90, a boss 126 hangs down at a position corresponding to the insertion hole 92 formed in the reinforcing chassis 90 of the elbow pad 124, and the fixing screw 94 is inserted into the insertion hole 92. When the boss 126 is screwed in, the elbow pad 124 is fixed to the reinforcing chassis 90.
[0093]
Next, the operation of the armrest according to the embodiment of the present invention will be described.
[0094]
First, the up and down movement of the armrest will be described.
[0095]
As shown in FIGS. 9 and 10, the release button 58 protruding from the column cover 78 is pressed. As a result, the pressing plate 72 is pressed in the direction against the urging force of the coil spring 76, the lock arm 48 rotates around the pin 68, and the pin 66 moves along the long hole 52.
[0096]
For this reason, the pin 66 locked in the locking groove 34 of the rack member 26 moves to the slide groove 32, and the pin 66 is unlocked. In this state, as shown in FIG. 11, the elbow pad 124 can be moved up and down (in this case, moved up).
[0097]
When the pressing force that presses the release button 58 at the predetermined height of the elbow pad 124 is released, the pressing plate 72 is returned around the pin 68 by the restoring force of the coil spring 76. As a result, the pin 66 located in the slide groove 32 moves along the long hole 52 and is locked in the locking groove 34, and the height of the elbow pad 124 is set.
[0098]
Since the elbow pad 124 can be moved up and down in this way, the height of the elbow pad 124 can be adjusted according to the body shape (particularly the length of the arm) of the user sitting on the seating portion. The fatigue feeling of the person can be reduced.
[0099]
Next, the slide movement of the armrest will be described.
[0100]
As shown in FIG. 6, in the slide rail 96, the long hole portion 96A can abut along the longitudinal direction of the upper step portion 88B of the slider 88, and the inner wall surface 98A of the fitting rib 98 is a stopper member. The outer wall surfaces of the 84 stopper ribs 86 and the lower step portion 88 </ b> C of the slider 88 can be in contact with each other.
[0101]
For this reason, as shown in FIGS. 13 and 14, the elbow pad 124, the reinforcing chassis 90, and the slide rail 96 can be slid along the long hole portion 96 </ b> A of the slide rail 96 via the slider 88 and the stopper member 84. Become. At this time, the elongated hole portion 90A of the reinforcing chassis 90 and the elongated hole portion 90A of the slide rail 96 are exposed, but the exposed portion is blocked by the blocking member 104.
[0102]
Here, for example, although not shown, when the elbow pad is intermittently slid along the longitudinal direction of the elbow pad, the elbow is placed on the elbow pad with the elbow pad positioned in advance. Even if the position of the elbow pad in the front-rear direction with respect to the seating portion is changed with the elbow placed on the pad, the engagement state with the member that slides the elbow pad intermittently must be released.
[0103]
The positional relationship of the elbow pad 124 in the front-rear direction with respect to the seating portion varies depending on the distance between the personal computer base and the seating portion 124, so that the elbow pad 124 is positioned with the elbow placed on the elbow pad 124. Is preferred.
[0104]
In the present invention, as shown in FIG. 4, the slide rail 96 is simply slid along the long hole portion 96 </ b> A of the slide rail 96 via the slider 88 and the stopper member 84.
[0105]
For this reason, the elbow pad 124 can be slid back and forth with respect to the seating portion at a suitable position of the user while the elbow is placed on the elbow pad 124, which is very convenient. Also, unlike intermittent slide movement, it can cope with subtle positional deviations.
[0106]
Next, the rotational movement of the armrest will be described.
[0107]
As shown in FIG. 1, the reinforcing chassis 90, the slider 88, the slide rail 96, the closing member 104, and the plate 116 are inserted into the shaft body 82, respectively, but the movement of the shaft body 82 in the axial direction is restricted. The shaft body 82 can be integrally rotated while being engaged with each other.
[0108]
In the state where the elbow pad 124 is positioned, the protrusion 118 of the plate 116 and the recess 114 of the selector plate 110 are fitted as shown in FIGS.
[0109]
When the elbow pad 124 is rotated from this state, the plate 116 also rotates integrally through the reinforcing chassis 90 and the slide rail 96 to which the elbow pad 124 is fixed. On the other hand, since the selector plate 110 is fixed to the shaft body 82, as shown in FIG. 8, the fitting state of the projection 118 and the recess 114 is released, and the selector plate 110 is pressed by the projection 118 and elastically deformed. To do. At this time, the elastic deformation of the selector plate 110 is absorbed by the cushion 108.
[0110]
Then, as shown in FIG. 3B, when the projection 118 moves to a position facing the recess 114, the selector plate 110 is restored, and the projection 118 is fitted with the recess 114, together with the click sound and the elbow. The pad 124 stops rotating.
[0111]
Thus, by making the elbow pad 124 rotatable, it is possible to adjust the elbow pad 124 to the optimum position according to the work content or the like. In particular, when operating a keyboard or mouse of a personal computer or the like, the left and right elbow pads 124 can be rotated inward, and the left and right elbow pads can be placed on the elbow pads 124. Can be reduced, and workability is also improved.
[0112]
By the way, as shown in FIGS. 3A and 3B, straight portions 86A and 86B are formed on the outer peripheral wall of the stopper rib 86 so as to cross each other and to face each other. A concentric circular arc portion 86C of the inner peripheral wall is provided between 86B.
[0113]
Therefore, when the elbow pad 124 is rotated, the outer peripheral wall of the stopper rib 86 is in contact with the inner wall surface 98A of the fitting rib 98 formed on the slide rail 96 with the circular arc portion 86C. If the elbow pad 124 is positioned in parallel along the inner wall surface 98A of the joint rib 98, the rotation of the elbow pad 124 is restricted (here, 80 ° to the inside and 20 ° to the outside based on FIG. 8A). Can be rotated).
[0114]
Next, the action of the armrest according to the embodiment of the present invention will be described.
[0115]
In the present invention, the plate 116 shown in FIGS. 7 and 8 is made of metal, and the selector plate 110 is made of resin. Accordingly, when the elbow pad 124 is rotated (see FIGS. 3A and 3B), the fitting state between the protrusion 118 provided on the plate 116 and the recess 114 provided on the selector plate 110 is released. The plate 110 is elastically deformed. Here, a cushion 108 for absorbing the deformation of the selector plate 110 is provided.
[0116]
Since the elastic force is accumulated in the selector plate 110 due to the deformation of the selector plate 110, when the protrusion 118 of the plate 116 reaches the recess 114 of the selector plate 110, the selector plate 110 and the cushion 108 are restored, and the protrusion The portion 118 fits into the recess 114, and the elbow pad 124 stops rotating.
[0117]
In this way, the selector plate 110 is molded from resin and the selector plate 110 itself is deformed, for example, although not shown, an elastic piece is projected from an elastic plate and compared with a case where this elastic piece is deformed. As a result, the force required for deformation increases.
[0118]
Therefore, as compared with the case where the elastic piece is extended from the elastic plate material, the holding force for holding the state in which the protrusion 118 of the plate 116 is fitted in the recess 114 of the selector plate 110 can be increased.
[0119]
For this reason, there is no possibility that the elbow pad 124 rotates carelessly with the elbow placed. In addition, by deforming the selector plate 110 itself, the elastic function can be sufficiently exhibited without sagging like a leaf spring such as an elastic piece.
[0120]
Furthermore, in a state where the protrusion 118 of the plate 116 is released from the recess 114 of the selector plate 110, elastic force is accumulated in the selector plate 110 due to the deformation of the selector plate 110.
[0121]
Therefore, when the projection 118 reaches the recess 114, the projection 118 is fitted into the recess 114 along with the restoration of the selector plate 110, so that a click is obtained and the state where the elbow pad 124 stops rotating is objective. It has come to understand.
[0122]
Further, the recess 114 and the protrusion 118 are formed in a hemispherical shape, and the curvature radius of the recess 114 and the protrusion 118 is substantially the same, so that the elbow pad 124 stops rotating via the plate 116, the slide rail 96, and the reinforcing chassis 90. In this state, the elbow pad 124 does not rattle.
[0123]
By the way, when the elbow pad 124 rotates, the selector plate 110 fixed to the shaft body 82 is slid by the plate 116 that rotates together with the elbow pad 124.
[0124]
For this reason, the selector plate 110 can be less worn by molding the selector plate 110 with a resin having a low sliding resistance (for example, nylon 66 (containing 30% by weight glass fiber)).
[0125]
This also reduces the sliding resistance when the protrusions 118 of the plate 116 are fitted into the recesses 114 of the selector plate 110, and the rotational movement of the elbow pad 124 can be made smooth.
[0126]
On the other hand, the cushion 108 is deformed following the deformation of the selector plate 110 due to the fitting and release of the protrusion 118 of the plate 116 and the recess 114 of the selector plate 110, and is deformed and restored as the plate 116 rotates. Therefore, a foamable resin or an elastomer (for example, foamed urethane or rubber member) is optimal.
[0127]
Further, a wear prevention plate 106 is provided between the selector plate 110 and the cushion 108 so as to be in contact with the closing member 104. In a state where the wear prevention plate 106 is not present, the closing member 104 and the cushion 108 are in contact with each other, and when the reinforcing chassis 90 and the slide rail 96 are rotated, the closing member 104 is rotated via the slide rail 96. For this reason, this causes the cushion 108 to slide and wear out.
[0128]
However, by providing the wear prevention plate 106 that rotates integrally with the selector plate 110 and the cushion 108 interposed therebetween, the cushion 108 does not directly contact the closing member 104, so the cushion 108 is not worn.
[0129]
Here, the closing member 104 is rotatably inserted into the shaft body 82 and is prevented from rotating with respect to the slide rail 96. As shown in FIG. 5, the closing member 104 is provided with a closing piece 104 </ b> D, which closes the elongated hole 52 that is exposed as the elbow pad 124, the reinforcing chassis 90, and the slide rail 96 slide. 13 and FIG. 14). This prevents a finger from entering the elongated hole 52.
[0130]
Further, as shown in FIGS. 6 and 3A and 3B, a stopper rib 86 is erected on the stopper member 84, and the straight portion 86 B of the stopper rib 86 is connected to the fitting rib 98 of the slide rail 96. By contacting the inner wall surface 98 </ b> A, the rotation angle of the elbow pad 124 is regulated via the slide rail 96. As a result, the elbow pad 124 is prevented from being disposed backward and forward with respect to the seating portion.
[0131]
Further, in the rack member 26 shown in FIGS. 2 and 12, by forming the locking groove 34 in the inner wall 26A, the pin 66 has a long length, unlike the case where the rack groove is formed by penetrating the inner wall, although not shown. Even if the pin 66 is slightly displaced in the direction (arrow A direction) orthogonal to the swinging direction when swinging with respect to the hole 52, the pin 66 is restricted by the inner wall 26A. Only the portion is not locked in the locking groove 34.
[0132]
For this reason, since the square pipe 46 is always supported by the rack member 26 evenly through both ends of the pins 66 and 68, the rack member 26 can be prevented from being damaged by the support of one end of the pin 66.
[0133]
Needless to say, the embodiment is not limited to this. For example, the rotational movement of the elbow pad 124 can be rotated 80 ° inward and 20 ° outward with reference to FIG. 3A, but can be freely handled by changing the shape of the stopper rib 86.
[0134]
【The invention's effect】
  Since the present invention has the above-described configuration,And 2In the invention described in the above, compared to the case where the elastic piece is extended from the elastic plate material, the holding force for maintaining the state where the protrusion is engaged with the recess can be increased, and the elbow is placed There is no risk that the elbow pads will rotate inadvertently. Further, by deforming the disc itself, the elastic function can be sufficiently exerted without sagging like a leaf spring such as an elastic piece. Furthermore, when the protrusion is engaged with the recess, a click is obtained, and the state where the elbow pad has stopped rotating can be objectively understood.
[0135]
  Claim3In the invention described inElastic plateWears on the disc, butElastic plateBy providing a wear prevention plate that rotates integrally withElastic plateWill not interview the elbow stand directly,Elastic plateWill not wear out.
[0136]
  Claim4In the invention described in (4), the finger is prevented from entering the elongated hole. Claim5In the invention described in (1), the elbow mount is prevented from being arranged in the reverse direction with respect to the seating portion by regulating the rotation angle of the elbow mount.
[0137]
  Claim6In the invention described in (1), even if the lock member is slightly displaced in the direction orthogonal to the rocking direction when the lock member is rocked with respect to the long hole, the lock member is restricted by the inner wall. Only one end of the member is not locked in the rack groove. For this reason, since the support is always supported by the rack groove evenly through both ends of the lock member, it is possible to prevent the rack groove from being damaged due to the support of one end of the lock member.
[0138]
  Claim7When the release button is pressed, the locked state between the lock member and the rack groove is released, and when the pressing force of the release button is released, the lock member is engaged with the rack groove by the urging force of the urging means. At the same time, the release button returns to the original state.
[0139]
  Claim8In the invention described in (3), the wear of the disk can be reduced. In addition, the sliding resistance when the protrusions of the plate engage with the recesses of the disk is reduced, and the rotational movement of the elbow support can be made smooth. Claim9In the invention described in (4), the elbow pad does not rattle in a state where the elbow pad stops rotating via the plate and the elbow base by making the curvature radius of the recess and the protrusion substantially the same.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an armrest according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of a rack member, a square pipe, and a lock arm that constitute an armrest according to an embodiment of the present invention.
FIGS. 3A and 3B are plan views showing the relationship between a support member and a slide rail showing the rotational movement of the armrest according to the embodiment of the present invention. FIGS.
FIG. 4 is an exploded perspective view of an armrest according to the embodiment of the present invention.
FIG. 5 is a plan view showing a relationship between a slider and a slide rail constituting the armrest according to the embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a relationship between a stopper member, a slider, and a slide rail that constitute an armrest according to an embodiment of the present invention.
FIG. 7 is a cross-sectional view showing a relationship between a plate, a selector plate, and a cushion constituting the armrest according to the embodiment of the present invention.
FIG. 8 is a cross-sectional view showing a relationship between a plate, a selector plate, and a cushion constituting the armrest according to the embodiment of the present invention.
FIG. 9 is a cross-sectional view showing an armrest according to an embodiment of the present invention.
FIG. 10 is a cross-sectional view showing an armrest according to an embodiment of the present invention, showing a state where a release button is pressed.
FIG. 11 is a cross-sectional view showing an armrest according to an embodiment of the present invention, showing a state where the armrest is moved up.
FIG. 12 is a cross-sectional view showing the relationship between the rack member and the pins constituting the armrest according to the embodiment of the present invention.
FIG. 13 is a partial cross-sectional view showing an armrest according to an embodiment of the present invention.
FIG. 14 is a partial sectional view showing the armrest according to the embodiment of the present invention, and shows a state in which the armrest is slid.
[Explanation of symbols]
24 Oval pipe (sheath tube, strut)
26 Rack member (rack groove, support)
46 square pipe (support, support)
48 Lock arm (arm, unlocking means, support)
58 Release button (release button, unlocking means, support)
66 pin (locking member, support)
76 Coil spring (biasing means, unlocking means, support)
80 seat plate
84 Stopper member (stopper)
90 Reinforced chassis (Elbow stand)
96 Slide rail (Elbow stand)
96A long hole (long hole)
104 Blocking member (blocking plate)
106 Wear prevention plate
108 Cushion (elastic plate)
110 Selector plate (disc)
114 recess
116 plates
118 Projection

Claims (9)

A column that is erected from both sides of the seat;
A seat plate provided at the upper end of the column;
An elbow stand supported by the seat plate and to which an elbow pad is attached;
An elongated hole formed on the elbow stand, engaged with a shaft standing from the seat plate, and capable of sliding and rotating the elbow stand relative to the seat plate;
Provided on the elbow stand, Rutotomoni central portion is non-rotatably fixed to the shaft body, a disc having a plurality of recesses are formed along the circumferential direction on the upper surface,
Rotatably attached to the shaft together with the elbow stand in a state in which the movement in the axial direction is constrained in the shaft body, and a plate having a projection to be engaged with the recess,
With
An armrest having a gap in which an elastic plate allowing deformation of an outer peripheral portion of the disc is disposed below the disc.   The armrest according to claim 1, wherein the elastic plate is disposed in the gap.   The armrest according to claim 1 or 2, further comprising an abrasion prevention plate serving as a sliding surface for the elbow stand with the elastic plate interposed between the circular plate and the disc.   2. A shaft that is rotatably inserted into the shaft body and is prevented from rotating with respect to the elbow stand, and has a closing plate that closes the elongated hole that is exposed as the elbow mount slides. The armrest according to any one of 3 above.   The armrest according to any one of claims 1 to 4, further comprising a stopper that is fixed to the shaft body and that abuts on a peripheral edge of the elongated hole to regulate a rotation angle of the elbow stand. The strut is
A hollow support to which the seat plate is fixed;
A locking member projecting to both sides from a long hole formed in the side wall of the support;
Unlocking means for swinging the locking member along the elongated hole;
A sheath tube in which the support is removably inserted;
A rack groove that is formed along the vertical direction on the inner wall of the sheath tube and engages both ends of the lock member;
The armrest according to claim 1, comprising: The unlocking means is
An arm that is swingably loaded into the support and to which the lock member is attached;
Urging means for urging the arm and bringing the locking member into engagement with the rack groove;
A release button for releasing the locking state between the lock member and the rack groove by pressing the arm from the outside of the support;
The armrest according to claim 6, comprising:   The armrest according to any one of claims 1 to 7, wherein the circular plate is formed of a resin and the elastic plate is formed of a foamable resin or an elastomer.   The armrest of the chair according to any one of claims 1 to 8, wherein the inner shape of the recess and the outer shape of the protrusion are spherical, and the curvature radii thereof are substantially the same.

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